Mtn doesn’t want to cancel my contract!!!

The worst customer service ever. I took a lte contact Feb 2021 and canceled it in August 2021. I went into one of the stores and was told to call customer service to get a cancellation fee. Which I did and paid. In October I received statements and invoices, I emailed them to ask why I am receiving these docs to no response. Next thing they debit my account. I called customer service but couldn’t get through because the number I am querying about doesn’t exist anymore. Their stupid service doesn’t allow you to get through to an actual person, I kept hitting IVRs. I contact them via Twitter, and I am told that I paid cancellation fee but never called customer service to inform them that I paid for them to cancel my account. I admit my “fault” and ask them to cancel the contract. This was 3 weeks ago, today I get hit with another debit order. I mean wow. It is evident that they enjoy taking peoples money nje. Their Twitter representative was able to tell me that I paid cancellation and for some reason they think I did that for fun. Meanwhile the lte number doesn’t work but they continue to debit my account. I want all my money reversed!!!! I met someone who works for mtn a month ago and asked her to check my account and she says it’s canceled but why the hell am I still being debited?